According to her article in thepeerage, she married the Earl of Kent Reginald Grey, but had a child by her next husband Sir John Wingfield.

From Wikimedia.

Susan Bertie wears a simple dress of black with silver embroidery and pearls with a matching escoffion. Her skin, hair, and puffed cloth ornaments provide the other colors. She appears to be wearing a chain necklace, arranged in swags from her neckline.